>===== Original Message From pic microcontroller discussion list
<PICLIST@MITVMA.MIT.EDU> =====
>What you are trying to do is not all that hard. Most flash devices today (I
am
>dealing with a 28F800B3B right now myself) don't require special voltages to
erase
>or program unless you want to do fast production programming (another issue
>altogether). It is simply a matter of writing data patterns to the chip in a
>specific order and then reading a location until the chip tells you it's
done.
>
>What is required is that you need to drive ALL the address lines and ALL the
data
>lines, which is beyond the capabilities of a PIC. Well, I suppose you could
use a
>PIC for serial download and then drive some external latches. The data lines
would
>obviously have to be bidirectional. (hmmmm, 8 I/O's to bus the latches. 4
more for
>latch select and 3 or 4 more for the control lines to the flash itself. 2
more for
>serial data to the host...18 i/o lines...could be done).
>
>What you need to do is determine the exact type of the chip and then download
the
>data sheet from the manufacturer. Then you can tell exactly what is needed to
>program the chip.
>
>However, how do you justify the 3 or 4 days of effort required to get the all
>together just to save a $100-$150 motherboard?
>
>Brett

It's not about the money really, it's also a matter of seeing if I can do it.
You seem like a guy who knows a lot about these things, unlike me who has only
just entered this world.  I hope I can learn some as I go along.

Eivind.

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